CN101990190A - Method and device for selecting gateway in mobile communication network as well as system comprising device - Google Patents
Method and device for selecting gateway in mobile communication network as well as system comprising device Download PDFInfo
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- CN101990190A CN101990190A CN2009101658262A CN200910165826A CN101990190A CN 101990190 A CN101990190 A CN 101990190A CN 2009101658262 A CN2009101658262 A CN 2009101658262A CN 200910165826 A CN200910165826 A CN 200910165826A CN 101990190 A CN101990190 A CN 101990190A
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- apn
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Abstract
The invention discloses method and device for selecting a gateway in a mobile communication network as well as a mobile communication system comprising the device. The gateway is selected by binding an expanded access point name to a dedicated gateway IP address. The method reduces the requests to a DNS (Domain Name System) server and relieves the burden of the DNS server to ensure that time delay is reduced during PDP (Plasma Display Panel) activation.
Description
Technical field
The present invention relates to a kind of method for selecting gateway and device, especially relate to a kind of mobile communication system that mobile communications network is selected gateway approach and device and comprised this device that is used for.
Background technology
In 3GPP standard mobile network, when activating packet data protocol (PDP) context or set up evolved packet system (EPS) carrying, Serving GPRS Support Node (SGSN) or mobile management entity (MME) have to carry out the selection of Gateway GPRS Support Node/gateway/PDN Gateway (GGSN/SGW/PGW), and it will be a foundation with APN (APN) usually to a considerable extent.
Before sending inquiry, extension name can be added APN to select more special-purpose gateway to domain name system (DNS) server.Especially in the mobile network who supports the roaming of ownership route, part mobile radio station/subscriber equipment (MS/UE) identifier, for example mobile subscriber ISDN number (MSISDN) or international mobile subscriber identification (IMSI), quilt is through being commonly used for the APN extension name, to select home gateway.
In prior art as shown in Figure 1, at step S100, the MS of roaming (roaming into B province as economizing from A) initiates PDP to SGSN; At step S102, SGSN initiates dns resolution, and wherein APN and part IMSI/MSISDN are included in the DNS request, " UNIWAP.[IMSI/MSISDN] "; At step S104, DNS returns the IP address of HOST GGSN to SGSN; At last, at step S106, SGSN sends to HOST GGSN with the PDP message that generates.
Yet in large-scale mobile network, according to network and quantity planning, the numeral that needs considerable MS/UE identifier is with the expression home area.For example, in China, except country code+86, beginning seven bit digital of MSISDN are represented home area specially.Specifically, be example with population near Shanghai of 20,000,000, as shown in table 1 for the quantity of the MSISDN sequence of three mobile operator.
The quantity of the MSISDN of operator of table 1 Shanghai Mobile sequence
| China Mobile | CHINAUNICOM | China Telecom | |
| The quantity of MSISDN sequence | 2646 | 1007 | 1025 |
With the China Mobile is example, if two APN are provided, then needs 2646*2 inlet in dns server, to locate concrete GGSN.And, if China Mobile wants to support roams home that between all provinces, city, district then the quantity of DNS inlet will surpass 100K.
Too much DNS inlet makes slack-off to the response of the inquiry in the dns server, and makes the DNS cache efficient among SGSN or the MME reduce, thereby has prolonged PDP context activation or the EPS carrying is set up the used time, and success rate is descended.
In a word, the defective that gateway is selected in the existing mobile communication network mainly is: the one, and the dns resolution request is too much, and almost each PDP context activation all will go to dns server, and this can apply very big burden to dns server; The 2nd, in dns server, dispose the too much new record of separating, there is not host's file can store these records.So,, just do not have the PDP file to be activated if dns server is shut down.If the DNS inquiry comprises 10000 records then being arranged 4 IMSI/MSISDN in dns server; The 3rd, extra dns resolution will increase the time delay of PDP active program; The 4th, the IMSI/MSISDN sequence continues to change, so the operator has to continue increase the DNS record in dns server.
Summary of the invention
The objective of the invention is provides a kind of method and apparatus of selecting gateway in mobile communications network in order to overcome the defective that prior art exists.In order to realize this purpose, the technical solution used in the present invention is as follows.
First aspect according to the embodiment of the invention, a kind of method that is used for selecting at mobile communications network gateway is provided, comprise: request step, Serving GPRS Support Node response roamer's PDP activates request, uses through the APN of expansion and initiates the dns resolution request to dns server; And returning step, described Serving GPRS Support Node is returned in the dedicated gateway IP address that described dns server will bundle with the APN through expansion.
Second aspect according to the embodiment of the invention, a kind of device that is used for selecting at mobile communications network gateway is provided, comprise: request module, be used to make Serving GPRS Support Node response roamer's PDP to activate request, use through the APN of expansion and initiate the dns resolution request to dns server; And returning module, described Serving GPRS Support Node is returned in the dedicated gateway IP address that is used to described dns server will be bundled with the APN through expansion.
According to the third aspect of the embodiment of the invention, a kind of mobile communication system is provided, comprise the device that is used for selecting gateway at mobile communications network according to the second aspect of the embodiment of the invention.
According to method and apparatus of the present invention and system, when the APN of SGSN or the selection of MME execution gateway resolves, can reduce the response time of DNS inquiry, thereby accelerate PDP context activation and EPS carrying foundation, and also improve success rate.Gateway among the mobile network is selected, made that per second inquiry (QPS) capacity requirement of dns server is unfettered.
Below in conjunction with accompanying drawing and by specific embodiment the present invention is further specified.
Description of drawings
Fig. 1 is the schematic diagram of selecting gateway in mobile communications network according to prior art;
Fig. 2 is the flow chart of selecting the method for gateway in mobile communications network according to the embodiment of the invention;
Fig. 3 is a schematic diagram of selecting the method for gateway according to the APN parsing that will have user's logon identifier of one embodiment of the invention as extension name;
The schematic diagram that Fig. 4 uses in mobile communication system according to the method for one embodiment of the invention;
Fig. 5 is the structural representation of selecting the device of gateway in mobile communications network according to one embodiment of the invention.
Embodiment
As shown in Figure 2, be the flow chart of in mobile communications network, selecting the method for gateway according to the embodiment of the invention, mainly comprise request step S204 and return step S206; In addition, also comprise configuration step S200, finding step S202 and generation step S208 alternatively.
In configuration step S200, will be configured in the dns server after bundling through the APN and the dedicated gateway IP address of expansion.
In finding step S202, Serving GPRS Support Node response roamer's PDP activates request, uses through the APN of expansion and search dedicated gateway IP address in the high-speed cache of Serving GPRS Support Node; If wherein find dedicated gateway IP address, then described Serving GPRS Support Node generates the PDP request and sends it to host gateway GPRS Support Node (Host GGSN) according to this dedicated gateway IP address; Otherwise, carry out request step S204.
In request step S204, Serving GPRS Support Node response roamer's PDP activates request, uses through the APN of expansion and initiates the dns resolution request to dns server.
In returning step S206, described Serving GPRS Support Node is returned in the dedicated gateway IP address that described dns server will bundle with the APN through expansion.
In generating step S208, the dedicated gateway IP address that Serving GPRS Support Node returns according to described dns server generates the PDP request and sends it to host GGSN.
Below, illustrate how will bundle by example through the APN and the dedicated gateway IP address of expansion.
Example 1
In this example, the APN that will have user's logon identifier resolves as extension name.Preferably, the APN that will have certain customers' logon identifier resolves as extension name.
As shown in table 2, in dns server, the IP address of APN and certain customers login (as Home Location Registry HLR/ home subscriber server HSS) identifier and dedicated gateway is bundled.
Table 2APN and certain customers' logon identifier are bundled in the dns server
| APN.SRI | Gateway ip address |
| cmwap.001 | 10.1.1.1 |
| cmwap.002 | 10.1.1.2 |
| ... | ... |
As shown in Figure 3, when MS/UE connects network, Serving GPRS Support Node (SGSN) or mobile management engine (MME) will obtain user's logon identifier (S300), sending inquiry (S302) before to dns server, this user's logon identifier (preferably with its part) is added to APN as extension name, then, dns server will return dedicated gateway IP address to select gateway (S304).
Under the situation of this example, the DNS record in dns server is configured to: HLR number＞Gateway GPRS Support Node of APN APN+ Home Location Registry IP.
In addition, under the situation of this example, if increase new HLR, select the method for gateway also to comprise the interpolation step alternatively according to the embodiment of the invention, the Home Location Registry number that is used for increasing newly adds dns server to.
Example 2
In this example, will have the user and login the APN parsing of predefine mark as extension name.
In user's login (HLR/HSS), the predefine mark of representing concrete attributed region is added to each signatory APN.
As shown in table 3, in dns server, will have the APN of predefine mark and the IP address of dedicated gateway and bundle.
The APN that table 3 has the predefine mark is bundled in the dns server
| The APN that has the predefine mark | Gateway ip address |
| cmwap.sh | 10.1.1.1 |
| cmwap.bj | 10.1.1.2 |
| ... | ... |
In MS, APN itself (for example CMWAP or CMNET do not have mark) is used to activate PDP Context, this means in MS side not influence.
In Serving GPRS Support Node (SGSN) or mobile management entity (MME), be used as prefix from the APN of MS, activate to find which signatory APN should be used to current PDP.
On the other hand, if Serving GPRS Support Node (SGSN) can be logined the mark that (HLR/HSS) sign obtains province, city, district from the user, Serving GPRS Support Node (SGSN) just can bundle the APN and the mark that is used for dns resolution from MS.Then, just there is no need in user's login (HLR/HSS), to add mark.
As shown in Figure 4, be the schematic diagram of in mobile communication system, using according to the method for one embodiment of the invention.At first, the roamer MS that economizes from B sends PDP to Serving GPRS Support Node (SGSN) and activates request (S400).
SGSN responds this PDP and activates request, in the high-speed cache of SGSN, search earlier and whether preserve and APN+HLR number of this user corresponding dedicated gateway IP address (S402), if found corresponding dedicated gateway IP address (S404), then generate the PDP request in view of the above and send it to the Host GGSN (S410) that B economizes; If do not find corresponding dedicated gateway IP address, SGSN initiates to comprise APN+HLR number dns resolution request (S406) to dns server, and dns server will return to SGSN (S408) with the HOSTGGSN IP address of APN+HLR number binding.The HOSTGGSN IP address that SGSN then returns according to dns server generates the PDP request and sends it to the Host GGSN (S410) that B economizes.
Wherein SGSN also can respond dns resolution request from roamer's PDP activation request to dns server that directly initiate to comprise the APN+HLR number from, but by in its high-speed cache, searching earlier, can make go to dns server request still less, the burden of dns server is lower, and it is minimum to make that the PDP activationary time postpones.
In addition, only use APN APN for the local user.And for local MS, SGSN has very big chance according to the size of local HLR number and cache and find HOST GGSN IP in high-speed cache.
As shown in Figure 5, be the structural representation of in mobile communications network, selecting the device of gateway according to one embodiment of the invention, mainly comprise request module 504 and return module 506; In addition, also comprise alternatively configuration module 500, search module 502 and generation module 508.
Returning module 506 is used to make described dns server to return Serving GPRS Support Node with the dedicated gateway IP address that bundlees through the APN of expanding.
The dedicated gateway IP address that generation module 508 is used to Serving GPRS Support Node is returned according to dns server generates the PDP request and sends it to host GGSN.
In addition, will have under the situation of APN parsing as extension name of certain customers' logon identifier, and if increase new HLR, also comprise the interpolation module alternatively according to the present embodiment device, the Home Location Registry number that is used for increasing newly adds dns server to.
Device according to the selection gateway of present embodiment can be implemented in the mobile communications network by hardware, software, firmware or its combination, to carry out method according to selection gateway of the present invention, this realizes easily to those skilled in the art, does not do detailed description at this.
More than describe the present invention by specific embodiment, but the present invention is not limited to these specific embodiments.Those skilled in the art should be understood that, can also make various modifications to the present invention, be equal to replacement, change or the like, for example with a step in the foregoing description or module is divided into two or more steps or module realizes, perhaps opposite, the function of two or more steps in the foregoing description or module is placed in a step or the module realizes.But these conversion all should be within protection scope of the present invention as long as do not deviate from spirit of the present invention.In addition, the symbol of more employed terms of present specification and claims and employing is not restriction, only is for convenience of description.
Claims (25)
1. a method that is used for selecting at mobile communications network gateway is characterized in that, comprising:
Request step, Serving GPRS Support Node response roamer's PDP activates request, uses through the APN of expansion and initiates the dns resolution request to dns server; And
Return step, described Serving GPRS Support Node is returned in the dedicated gateway IP address that described dns server will bundle with the APN through expansion.
2. the method for claim 1 is characterized in that, also comprises:
Generate step, the dedicated gateway IP address that described Serving GPRS Support Node returns according to described dns server generates the PDP request and sends it to the host gateway GPRS Support Node.
3. the method for claim 1 is characterized in that, also comprises:
Finding step, Serving GPRS Support Node response roamer's PDP activates request, uses through the APN of expansion and search dedicated gateway IP address in the high-speed cache of Serving GPRS Support Node;
If find dedicated gateway IP address, then described Serving GPRS Support Node generates the PDP request and sends it to the host gateway GPRS Support Node according to this dedicated gateway IP address; Otherwise, carry out request step.
4. the method for claim 1 is characterized in that, also comprises:
Configuration step is used for APN and dedicated gateway IP address through expansion are configured in dns server after bundling.
5. as each described method in the claim 1 to 4, it is characterized in that: described APN through expansion is the APN that has user's logon identifier.
6. as each described method in the claim 1 to 4, it is characterized in that: described APN through expansion is the APN that has certain customers' logon identifier.
7. method as claimed in claim 6 is characterized in that: described user's logon identifier comprises Home Location Registry or home subscriber server.
8. method as claimed in claim 7 is characterized in that, also comprises:
Add step, the Home Location Registry number that is used for increasing newly adds dns server to.
9. method as claimed in claim 7 is characterized in that, the DNS record in described dns server is configured to:
HLR number＞Gateway GPRS Support Node of APN APN+ Home Location Registry IP.
10. as each described method in the claim 1 to 4, it is characterized in that: described APN through expansion is to have the APN that the user logins the predefine mark.
11. method as claimed in claim 10 is characterized in that: described user logins the predefine mark that the predefine mark is the expression attributed region, is added in each signatory APN.
12., it is characterized in that: only use APN APN for the local user as each described method in the claim 1 to 4.
13. a device that is used for selecting at mobile communications network gateway is characterized in that, comprising:
Request module is used to make Serving GPRS Support Node response roamer's PDP to activate request, uses through the APN of expansion and initiates the dns resolution request to dns server; And
Return module, described Serving GPRS Support Node is returned in the dedicated gateway IP address that is used to described dns server will be bundled with the APN through expansion.
14. device as claimed in claim 13 is characterized in that, also comprises:
Generation module, the dedicated gateway IP address that is used to described Serving GPRS Support Node is returned according to described dns server generates the PDP request and sends it to the host gateway GPRS Support Node.
15. device as claimed in claim 13 is characterized in that, also comprises:
Search module, be used to make Serving GPRS Support Node response roamer's PDP to activate request, use through the APN of expansion and in the high-speed cache of Serving GPRS Support Node, search dedicated gateway IP address;
If find dedicated gateway IP address, then described Serving GPRS Support Node generates the PDP request and sends it to the host gateway GPRS Support Node according to this dedicated gateway IP address; Otherwise, the operation request module.
16. device as claimed in claim 13 is characterized in that, also comprises:
Configuration module is used for APN and dedicated gateway IP address through expansion are configured in dns server after bundling.
17. as each described device in the claim 13 to 16, it is characterized in that: described APN through expansion is the APN that has user's logon identifier.
18. as each described device in the claim 13 to 16, it is characterized in that: described APN through expansion is the APN that has certain customers' logon identifier.
19. device as claimed in claim 18 is characterized in that: described user's logon identifier comprises Home Location Registry or home subscriber server.
20. device as claimed in claim 19 is characterized in that, also comprises:
Add module, the Home Location Registry number that is used for increasing newly adds dns server to.
21. device as claimed in claim 19 is characterized in that, the DNS record in described dns server is configured to:
APN APN+ Home Location Registry HLR number＞Gateway GPRS Support Node IP.
22. as each described device in the claim 13 to 16, it is characterized in that: described APN through expansion is to have the APN that the user logins the predefine mark.
23. device as claimed in claim 22 is characterized in that: described user logins the predefine mark that the predefine mark is the expression home area.
24., it is characterized in that: only use APN APN to carry out gateway for the local user and select as each described device in the claim 13 to 16.
25. a mobile communication system is characterized in that: the device that comprises each described selection gateway of claim 13 to 24.
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| WO2013023591A1 (en) * | 2011-08-15 | 2013-02-21 | 中兴通讯股份有限公司 | Method and device for selecting policy server |
| CN107645722A (en) * | 2016-07-20 | 2018-01-30 | 中国电信股份有限公司 | Dedicated network selects cut-in method and system, public network MME, HSS and base station |
| CN114363912A (en) * | 2021-12-28 | 2022-04-15 | 天翼物联科技有限公司 | Data transmission method, system, computer device and storage medium of heterogeneous network |
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| WO2006055986A2 (en) * | 2004-11-18 | 2006-05-26 | Azaire Networks Inc. | Service authorization in a wi-fi network interworked with 3g/gsm network |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013023591A1 (en) * | 2011-08-15 | 2013-02-21 | 中兴通讯股份有限公司 | Method and device for selecting policy server |
| CN107645722A (en) * | 2016-07-20 | 2018-01-30 | 中国电信股份有限公司 | Dedicated network selects cut-in method and system, public network MME, HSS and base station |
| CN107645722B (en) * | 2016-07-20 | 2021-01-26 | 中国电信股份有限公司 | Private network selective access method and system, public network MME, HSS and base station |
| CN114363912A (en) * | 2021-12-28 | 2022-04-15 | 天翼物联科技有限公司 | Data transmission method, system, computer device and storage medium of heterogeneous network |
| WO2023125436A1 (en) * | 2021-12-28 | 2023-07-06 | 天翼物联科技有限公司 | Data transmission method and system for heterogeneous network, computer device and storage medium |
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